Neutron radiating device in hospital

A hospital neutron irradiation and neutron technology, applied in X-ray/γ-ray/particle irradiation therapy, medical science, parts of surgical instruments, etc., to achieve the effect of optimization of pile power and irradiation flux

Inactive Publication Date: 2004-07-07
周永茂
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although there are currently nine countries in the world with 20 "medical research reactors" or "medical research reactors" for BNCT, the power of which is hundreds of kilowatts to tens of megawatts, but these research reactors are all designed In a nuclear research center or a comprehensive university, that is, the current "medical research reactor" must be located at a site isolated from ordinary residents, must rely on a comprehensive nuclear research center with radioactive waste storage and processing capabilities, and must be equipped with multiple Special power supply such as external power supply and special backup power supply must have a professional operation and maintenance engineering organization

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  • Neutron radiating device in hospital
  • Neutron radiating device in hospital
  • Neutron radiating device in hospital

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Embodiment Construction

[0018] Such as figure 1 As shown, a hospital neutron irradiator includes a reactor I for generating a neutron source and a neutron beam irradiation device II for drawing neutrons from the reactor I for treatment, wherein the reactor I includes A pool 11, a closed reactor container 1 set up in the pool 11 to contain water, a core 4 is installed in the lower part of the closed reactor container 1 containing water, and a Be ring neutron reflecting layer 3 is arranged around the core 4. The outer side of the ring neutron reflector 3 is provided with a tile-shaped water squeezer 5, and the reserve reactivity value of the core 4 is ρ ex =4~6×10 -3 Δk / k, the temperature coefficient of reactivity between heat carrier water and uranium-238 in fuel-a T ≈0.1×10 -3 Δk / k / ℃, where k is the effective multiplication coefficient, the number of hydrogen atoms in the moderator water H N and the number of uranium-235 atoms in the fuel U-235 N satisfies H N / U-235 N=180~200; The neutron beam irradiat...

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Abstract

A neutron radiator for the B-neutron capture therapy in hospital is composed of a reactor and a neutron beam radiating unit. Said reactor consists of a water pool, a sealed stack container in water pool, stack core in said container, a Be ring as neutron reaction layer surrounding said stack core, and a water squeezer outside said Be ring. Said neutron beam radiating unit comprises neutron filter, neutron reflection layer, gamma attenuating cavity, gamma Bi diffuser and LiF neutron collimator. It can be used to treat the cerebral colloma with high stability and safety.

Description

Technical field [0001] The invention belongs to a nuclear medical device, and specifically relates to a nuclear medical device for performing Boron Neutron Capture Therapy (BNCT). Background technique [0002] Boron Neutron Capture Therapy (BNCT) uses stable isotopes 10 B has a very large capture cross-section characteristic for thermal neutrons. 10 B guide into the malignant tumor tissue, and then use the neutron beam to irradiate the tumor tissue, causing 10 B(n,α) 7 Li reacts to produce a charged particle 4 α and a heavy ion 7 Li, the average energy of the reaction is about 2.35 MeV, this energy will be lost in the particle motion track similar to the size of cell tissue, which provides killing cancer cells and limits the possibility of harming adjacent normal tissues. [0003] The facility to realize BNCT must have three basic units that are organically connected, that is, a device that generates a neutron source, a neutron beam device that performs irradiation, and a medical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/00A61N5/10
Inventor 周永茂
Owner 周永茂
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